HJ4-T-AC220/240V

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Power relays such as HJ4-T-AC220/240V are extremely important components in many industrial and consumer electronics applications. Their purpose is to efficiently control and regulate the flow of electricity or other signals. The following provides an overview of the application field and working principle of HJ4-T-AC220/240V power relays.

Application Field

The HJ4-T-AC220/240V power relay is primarily used for controlling medium power AC applications, such as motor, air conditioning, mechanical equipment, and other related appliances. It finds extensive use in medical equipment, machinery, and locomotives, among other industries. Being a T type power relay featuring a modular design, it is suitable for low voltage and low current applications (over 2 Amps).

Working Principle

Like other power relays, the HJ4-T-AC220/240V uses a switching device (usually a coil) to control the current. When the coil is energized, it causes a magnetic field to be created, which in turn causes an armature to move and activate a set of contacts. This allows the flow of electricity through the contacts and activates the circuit. The power relay is also designed with an arc extinguishing device that helps protect the contacts from arcing.

Additionally, the HJ4-T-AC220/240V power relay has an over-temperature protection (OTP) function which cannot be turned off, thus preventing potential damage to the device due to thermal overload. Connections are made using clip-on terminals, with 2 coil terminals and 3 contact terminals. They also feature an access area at the bottom of the device for servicing and maintenance.

Conclusion

The HJ4-T-AC220/240V power relay is an essential component for controlling medium power AC applications such as motor, air conditioning, and mechanical equipment. It is designed for use with low voltage and low current applications (over 2 Amps). Its working principle is based on the use of a magnetic force to actuate an armature which in turn activates the contact points, while an arc extinguishing device helps protect the contacts from arcing. Additionally, the power relay has an over-temperature protection function which cannot be turned off, and clip-on terminals are provided for electrical connections. These features make the HJ4-T-AC220/240V an ideal choice for a variety of industrial and consumer electronics applications.

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